1. NISSAN Controls & Control Units On Sale
  2. sku: 9355060482490773
  3. STANDARD PRODUCTS 39XKSNZM

STANDARD MOTOR PRODUCTS 39XKSNZM Control Relay A/c

fits make: Nissan. year: 1984–1989.

39xksnzm Standard Motor Products A/c Control Relay Fits Nissan 300zx 1984-1989

( Brand: Standard Motor Products ), ( Manufacturer Part Number: 39XKSNZM ), ( Part Type: Control Motor ), ( Compatible Make/model: Nissan 300zx ), ( Compatible Years: 1986 1984 1985 1987 1988 1989 86 84 85 87 88 89 ), ( Fitment Info: A/c Compressor Control Relay With Automatic Temperature Con. ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review STANDARD MOTOR PRODUCTS A/c Control Relay Nissan fits 300ZX 1984–1989

The **Standard Motor 39XKSNZM Air Conditioning Control Relay** is a precision-engineered electrical component specifically designed for use in **Nissan 300ZX models manufactured between 1984 and 1989**, ensuring seamless integration with the vehicle s climate control system. This relay serves as a critical intermediary between the vehicle s air conditioning compressor clutch and the control module, allowing the system to engage or disengage the clutch with precision based on driver input from the climate control switches. Constructed from high-quality materials, including durable metal contacts and a robust plastic housing, this relay is built to withstand the rigors of frequent switching cycles while maintaining reliable performance under varying electrical loads. Its compact yet sturdy design ensures a secure fit within the vehicle s wiring harness, minimizing the risk of loose connections or mechanical failure over time. The **39XKSNZM** is a direct-fit replacement, compatible with the original equipment relay found in these 300ZX models, guaranteeing compatibility without the need for modifications or additional wiring adjustments. Whether replacing a faulty relay that has caused intermittent A/C operation, a relay that has burned out due to electrical surges, or one that has simply worn out from regular use, this relay provides a dependable solution that restores smooth, efficient air conditioning functionality. Its robust construction and adherence to OEM specifications make it an ideal choice for both professional mechanics and DIY enthusiasts seeking to maintain or restore optimal performance in their classic Nissan 300ZX.

### **Pros and Cons of Buying a Standard Motor 39XKSNZM A/C Control Relay for a 1984-1989 Nissan 300ZX**

#### **Pros:**

1. **Direct Fitment** This relay is specifically designed for the 1984-1989 Nissan 300ZX, ensuring compatibility without modifications. It will slot into the existing relay bay without issues.

2. **Reliability** Standard Motor is a reputable brand known for producing high-quality automotive relays. Their components are built to withstand electrical demands, reducing the risk of premature failure.

3. **Easy Installation** The relay is a direct replacement, meaning no wiring changes are required. It can be installed quickly, even by someone with basic mechanical knowledge.

4. **Cost-Effective** Compared to labor costs for professional installation, purchasing and installing this relay yourself saves money. It s also likely cheaper than buying an entire A/C control module if the relay is the only faulty component.

5. **Prevents Further Damage** A faulty A/C relay can cause intermittent or complete failure of the air conditioning system. Replacing it early prevents potential damage to other components like the compressor clutch or control board.

6. **Widely Available** Since it s a common part for older Nissan models, it can be found at auto parts stores, online marketplaces, or specialty automotive suppliers without much difficulty.

#### **Cons:**

1. **Potential Counterfeit Risk** Some online sellers may offer fake or low-quality replicas of Standard Motor parts. Buying from untrusted sources could result in a defective relay that fails shortly after installation.

2. **Age of the Vehicle** The 1984-1989 Nissan 300ZX is an older model, and some relays may degrade over time due to exposure to heat, moisture, or electrical fluctuations. Even a new relay may not last indefinitely if the vehicle s electrical system is unreliable.

3. **Diagnostic Uncertainty** If the A/C system has other underlying issues (e.g., a failing compressor clutch, low refrigerant, or a faulty control board), replacing just the relay may not fully resolve the problem. Additional diagnostics may be needed.

4. **Limited Longevity Guarantee** Standard Motor parts typically come with a standard warranty (often 1-2 years), but if the relay fails outside this period, replacement costs will be out of pocket.

5. **Physical Wear in Relay Bay** Over time, the relay socket or surrounding wiring in the 300ZX s fuse/relay box may become corroded or damaged. If not cleaned or inspected, a new relay may not function properly due to poor electrical contact.

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### **Conclusion:**

Replacing the A/C control relay in a 1984-1989 Nissan 300ZX with a **Standard Motor 39XKSNZM** is a practical and cost-effective solution if the relay is confirmed as the source of the A/C failure. The relay is a direct fit, reliable, and easy to install, making it a strong candidate for DIYers or those looking to avoid unnecessary labor costs. However, it s crucial to ensure the relay is genuine and that no other components (like the compressor clutch or control module) are contributing to the issue. If the problem persists after replacement, further diagnostics are warranted.

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### **Recommendation:**

1. **Verify the Problem** Before purchasing, confirm that the relay is indeed faulty by testing it with a multimeter or replacing it temporarily with a known-good relay from another system (e.g., a relay from the horn or horn circuit).

2. **Buy from a Trusted Source** Purchase the relay from a reputable supplier (e.g., RockAuto, Amazon with verified sellers, or a local auto parts store) to avoid counterfeit parts.

3. **Inspect the Relay Bay** Clean the relay socket and surrounding wiring with contact cleaner to ensure proper electrical connection. Check for corrosion or damage that could interfere with the new relay s function.

4. **Consider a Bundle** If the A/C system has been problematic, consider purchasing a spare relay or even a complete A/C control module as a backup, especially if the vehicle is frequently used.

5. **Test After Installation** After replacing the relay, thoroughly test the A/C system to ensure it operates correctly. If issues persist, consult a mechanic to rule out other potential causes.

For most cases where the relay is the confirmed culprit, this replacement is a **recommended and straightforward fix** that restores A/C functionality without major expense or complexity.

Details:

Renowned Global Manufacturer: As a global manufacturer of original equipment ignition Products, we maintain complete quality control throughout the manufacturing process from component to finished product. Standard Motor Products A/C Control Relay fits Nissan 300ZX 1984 - 1989 39XKSNZM: Brand: condition: New Notes: Compressor with automatic temperature control, Features:Built to Last: Our relays feature high-quality composite housings that protect against harsh temperatures and the most demanding under-hood conditions, ensuring lasting reliability. Product Specifications Contents: Relay. Spring Included: No.

Enhanced Wear Resistance: Featuring brass or copper contacts where specified, our relays offer extended wear resistance, ensuring reliability even in high-stress applications. Detailed Applications Years: Vehicle: 1984 - 1989 Nissan 300ZX.

part #: 39xksnzm price

  • $38.62

specifications nssnheatcontrol:

  • for makes: Nissan
  • for years: 1984-1989
  • brand: Standard Motor Products
  • mpn: 39xksnzm
  • part type: Control Motor
  • compatible make/model: Nissan 300zx
  • compatible years: 1986 1984 1985 1987 1988 1989 86 84 85 87 88 89
  • fitment info: A/c Compressor Control Relay With Automatic Temperature Con.
  • manufacturer warranty: 12 Month Warranty
  • attention: Read Full Description To Confirm Fitment
  • cs-sku: 400

returns nssnheatcontrol:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Seller

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  • city: La Grange, Illinois
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  • class: Economy
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general nssnheatcontrol:

  • condition: New
  • Car Truck Parts Accessories > Air Conditioning Heating > HVAC Controls Control Units

offer nssnheatcontrol:

  • options: Ship-to-home
  • started: April 7, 2026
  • availability: In Stock
  • quantity: 1
  • sold: 0
for makes: nissan, for years: 1984-1989, part type: control motor, compatible make/model: nissan 300zx, compatible years: 1986 1984 1985 1987 1988 1989 86 84 85 87 88 89, fitment info: a/c compressor control relay with automatic temperature con., manufacturer warranty: 12 month warranty, attention: read full description to confirm fitment, cs-sku: 400,
category: auto parts > car truck parts accessories > air conditioning heating > hvac controls control units, sku: 9355060482490773,
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  • New. Offer #1 priced at $38.62 + $0.00 shipping estimate = $38.62* total. Spring Included: No. 1984-1989 Nissan 300ZX.FREE SHIPPING

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